What filesystem for shared (read/write) PC/Mac external drive? [duplicate]
Solution 1:
If the hard drive is going to remain plugged into one computer or the other and shared over the network for the other computer's use, then use whichever the best filesystem for that computer is (NTFS for Windows, HFS+ for Mac).
If you're going to switch which computer the drive is plugged into, use NTFS. The NTFS-3G driver for MacFUSE is fairly mature, and without Boot Camp you are going to have a tough time getting Windows to recognize HFS+ filesystems.